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ROLLOVER SIMULATION OF SPORTS UTILITY VEHICLES
M. RAM PRABHU(M. RAM PRABHU),N.S. ANDRES(N.S. ANDRES),엄용균(Y.G. Eom),장봉춘(B.C. JANG) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
The simulations on dynamic stability of Sports Utility Vehicles using Carsim/Vehsim software are presented on this paper with the aim of studying the rollover process occurring in such vehicles. Carsim/Vehsim is an integrated simulation package that has been developed for chassis dynamics controls and integration. The simulation procedure makes use of dynamic testing maneuvers (Fishhook tests, J-Turn test and Double Lane Change test) recommended by NHTSA to evaluate the antirollover propensities of SUVs on road. The simulation results emphasize the need for better understanding of SUV rollover performance and characteristics that are very essential in enhancing vehicle design. Furthermore, the simulation dramatically shows less development time and cost reduction compared to field testing. This paper, in general, investigates the dynamic rollover characteristics of 4 SUVs in 2 different road conditions.
ARENA 소프트웨어를 이용한 자동차 부품 제조 공장 시뮬레이션 모델링
천성국(Sungkook Cheon),Ram Prabhu(Ram Prabhu),Nelson Adres(Nelson Adres),장봉춘(Bong-Choon Jang),엄용균(Yong Gyun Eom) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Many mid-sized companies in Korean automotive industry have attempted to solve the lack of human power, to control the quality of components, to improve the production rate, and to innovate the manufacturing line .The goals of this study are to analyze the production rate of an automotive component manufacturing line using simulation software, to construct a Flexible Automation Subassembly (FAS) system and to suggest an optimized layout design using FAS line. In this research, the simulation model for manufacturing line was developed and used the realistic data (production planning, component type, working order, process time, queue time, line rules, etc) of a medium sized company in Korean automotive industry. To complete this research, a simulation software 'ARENA' was used.
A Mathematical Model Development of Automotive 42-Volt Battery System and a Starter-Generator
N.S. ANDRES,M.RAM PRABHU,Y.G. Eom,B.C. JANG 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
The proposed mathematical model of the starter-generator system incorporates the motor speed, battery voltage and the desired current to estimate the moment generation capabilities of the starter-generator and the actual current of the battery system. The fundamentals for this mathematical modeling are the simulated results of the experimental data. These pertinent data are used in establishing the governing equations for the determination of motor moments, actual battery currents and efficiencies of the system's operation at different loading characteristics and speed regions. The derived equations are projected to incorporate into simulation programs which can be used in further study of the system's operations.
Patra, Satyajit,Muthuraman, Meenakshi Sundaram,Prabhu, A.T.J. Ram,Priyadharshini, R. Ramya,Parthiban, Sujitha Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.3
Context: In the last half century, discovering, developing and introducing of clinical agents from marine sources have seen great successes, with examples including the anti-cancer compound trabectedin. However, with increasing need for new anticancer drugs, further exploration for novel compounds from marine organism sources is strongly justified. Objective: The major aim of this study was to evaluate the antitumor and antioxidant potential of Sargassum tenerrimum J.Agardh (Sargassaceae) on Ehrlich ascites carcinoma (EAC) in Swiss albino mice. Materials and Methods: An ethanol extract of S. tenerrimum (EEST) from whole algae was used to evaluate cytotoxicity followed by in vivo assessment of toxicity, using biochemical parameters including hepatic and non-hepatic enzymes. Antioxidant properties were examined in animals bearing EAC treated with daily oral administration of 100-300 mg/kg extract suspension. Results: Antitumor effects of EEST in EAC bearing mice was observed with LD50 1815 mg/kg. Parameters like body weight, tumor volume, packed cell volume, tumor cell count, mean survival time and increase in life span in animals in the EAC bearing animals treated with EEST 300 mg/kg was comparable with control group. Significant differences were also seen with changes in total protein content, hepatic enzymes contents, MDA level, and free radical scavenging enzymes in untreated vs. EEST treated group animals. Conclusions: Evaluation of antioxidant enzymes and hepatic enzymes in the EAC animal model treated with EEST exhibited similar effects as the positive control drug 5-flurouracil. S. tenerrimum extracts contain effective antioxidants with significant antitumor activity.